Limits...
Resolving spatiotemporal characteristics of the seasonal hypoxia cycle in shallow estuarine environments of the Severn River and South River, MD, Chesapeake Bay, USA

View Article: PubMed Central - PubMed

ABSTRACT

The nature of emerging patterns concerning water quality stressors and the evolution of hypoxia within sub-estuaries of the Chesapeake Bay has been an important unresolved question among the Chesapeake Bay community. Elucidation of the nature of hypoxia in the tributaries of the Chesapeake Bay has important ramifications to the successful restoration of the Bay, since much of Bay states population lives within the watersheds of the tributaries. Very little to date, is known about the small sub-estuaries of the Chesapeake Bay due to limited resources and the difficulties in resolving both space and time dimensions on scales that are adequate to resolve this question. We resolve the spatio-temporal domain dilemma by setting up an intense monitoring program of water quality stressors in the Severn and South Rivers, MD. Volume rendered models were constructed to allow for a visual dissection of the water quality times series which illustrates the life cycle of hypoxia and anoxia at the mid to upper portions of the tidal tributaries. The model also shows that unlike their larger Virginian tributary counterparts, there is little to no evidence of severe hypoxic water intrusions from the main-stem of the Chesapeake Bay into these sub-estuaries.

No MeSH data available.


Related in: MedlinePlus

Spatiotemporal model of of hypoxia in the Severn River 2010.
© Copyright Policy - CC BY-NC-ND
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC5037264&req=5

fig0020: Spatiotemporal model of of hypoxia in the Severn River 2010.

Mentions: The life cycle of hypoxia in the Severn River tidal estuary in 2010, (Fig. 4) indicates that the dissolved oxygen volumes are at or above 5 mgl− at the mouth of the Severn River (0 km). During weeks 18 to 26 moving upstream at distances at 4 km toward distance 18 km, the dissolved oxygen volumes become hypoxic from the bottom to a depth of 4.5 meters. At weeks 28 to 36, the hypoxic volume increases in distance and expands to a depth of 1-meter. Anoxic conditions developed at distance 12 km at weeks 30 to 36 at a depth of 8 m and continued upstream to 18 km to a depth of 1 meter. The calculations show that 18% was 5 mgl− or greater and 61% was less than 2 mgl−1, and 4% was 0.2 mgl−1. This figure directly shows the life cycle of hypoxic volume spreading vertically, horizontally, and temporally through the water column and indicates the hypoxic waters are not being imported into the Severn River (0 km) from the Chesapeake Bay.


Resolving spatiotemporal characteristics of the seasonal hypoxia cycle in shallow estuarine environments of the Severn River and South River, MD, Chesapeake Bay, USA
Spatiotemporal model of of hypoxia in the Severn River 2010.
© Copyright Policy - CC BY-NC-ND
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC5037264&req=5

fig0020: Spatiotemporal model of of hypoxia in the Severn River 2010.
Mentions: The life cycle of hypoxia in the Severn River tidal estuary in 2010, (Fig. 4) indicates that the dissolved oxygen volumes are at or above 5 mgl− at the mouth of the Severn River (0 km). During weeks 18 to 26 moving upstream at distances at 4 km toward distance 18 km, the dissolved oxygen volumes become hypoxic from the bottom to a depth of 4.5 meters. At weeks 28 to 36, the hypoxic volume increases in distance and expands to a depth of 1-meter. Anoxic conditions developed at distance 12 km at weeks 30 to 36 at a depth of 8 m and continued upstream to 18 km to a depth of 1 meter. The calculations show that 18% was 5 mgl− or greater and 61% was less than 2 mgl−1, and 4% was 0.2 mgl−1. This figure directly shows the life cycle of hypoxic volume spreading vertically, horizontally, and temporally through the water column and indicates the hypoxic waters are not being imported into the Severn River (0 km) from the Chesapeake Bay.

View Article: PubMed Central - PubMed

ABSTRACT

The nature of emerging patterns concerning water quality stressors and the evolution of hypoxia within sub-estuaries of the Chesapeake Bay has been an important unresolved question among the Chesapeake Bay community. Elucidation of the nature of hypoxia in the tributaries of the Chesapeake Bay has important ramifications to the successful restoration of the Bay, since much of Bay states population lives within the watersheds of the tributaries. Very little to date, is known about the small sub-estuaries of the Chesapeake Bay due to limited resources and the difficulties in resolving both space and time dimensions on scales that are adequate to resolve this question. We resolve the spatio-temporal domain dilemma by setting up an intense monitoring program of water quality stressors in the Severn and South Rivers, MD. Volume rendered models were constructed to allow for a visual dissection of the water quality times series which illustrates the life cycle of hypoxia and anoxia at the mid to upper portions of the tidal tributaries. The model also shows that unlike their larger Virginian tributary counterparts, there is little to no evidence of severe hypoxic water intrusions from the main-stem of the Chesapeake Bay into these sub-estuaries.

No MeSH data available.


Related in: MedlinePlus